Add 70/20 and 63/84
1st number: 3 10/20, 2nd number: 63/84
70/20 + 63/84 is 17/4.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 84 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 20 × 21 = 420,
70/20 = 70 × 21/20 × 21 = 1470/420 - Likewise, for the 2nd fraction, since 84 × 5 = 420,
63/84 = 63 × 5/84 × 5 = 315/420 - Add the two like fractions:
1470/420 + 315/420 = 1470 + 315/420 = 1785/420 - 1785/420 simplified gives 17/4
- So, 70/20 + 63/84 = 17/4
In mixed form: 41/4
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